Cheapest South Korea eSIM 2026 — Lowest Price by Plan Size, Per GB & Trip Length
Last updated: June 17th, 2026
The cheapest South Korea eSIM in 2026 is Travelsim Asia at $2.99 for 1 GB / 7 days — but the cheapest option changes by plan size: Nomad wins 5 GB and Ubigi wins 10 GB. Travelsim Asia also leads at 3 GB ($6.99 / 15 days) and dominates 20 GB ($19.99 / 30 days — more than 25% below the next cheapest), while Nomad's 5 GB at $10.00 and Ubigi's 10 GB at $14.00 take the middle of the range. This guide breaks down the cheapest option at every data tier — with exact prices, validity windows, and network coverage included.
Cheapest South Korea eSIM 2026 — quick verdict by plan size
- Cheapest 1 GB: Travelsim Asia — $2.99 / 7 days (Saily next at $3.99)
- Cheapest 3 GB: Travelsim Asia — $6.99 / 15 days (Ubigi next at $7.00 / 7 days)
- Cheapest 5 GB: Nomad — $10.00 / 30 days (Travelsim Asia is $11.99 here)
- Cheapest 10 GB: Ubigi — $14.00 / 30 days (Travelsim Asia next at $16.99)
- Cheapest 20 GB: Travelsim Asia — $19.99 / 30 days (Nomad next at $28.00)
- Lowest absolute per GB: Nomad 50 GB / 30 days — $0.78/GB ($39.00)
- Most expensive on short trips: Holafly — unlimited only, about $4/day on short stays (a 7-day plan is $27.50); FUP threshold not disclosed
Prices as of June 17th, 2026. Always confirm on provider websites before purchasing.
Cheapest South Korea eSIM by plan size (full breakdown)
Prices alone don't tell the full story — a $7 plan that expires in 7 days is not "cheap" for a two-week trip. The table below includes validity alongside price so you can compare like for like. Travelsim Asia owns the small (1–3 GB) and large (20 GB) tiers; the middle of the range genuinely belongs to others.
| Data | Cheapest option | Price (USD) | Validity | Runner-up |
|---|---|---|---|---|
| 1 GB | Travelsim Asia | $2.99 | 7 days | Saily — $3.99 / 7d |
| 3 GB | Travelsim Asia | $6.99 | 15 days | Ubigi — $7.00 / 7d |
| 5 GB | Nomad | $10.00 | 30 days | Saily — $10.99 / 30d |
| 10 GB | Ubigi | $14.00 | 30 days | Travelsim Asia — $16.99 / 30d |
| 20 GB | Travelsim Asia | $19.99 | 30 days | Nomad — $28.00 / 30d |
All prices USD. Verified June 17th, 2026.
Cheapest South Korea eSIM for a 1-week trip
For a standard 7-day trip to South Korea with light-to-regular use — Naver Map, KakaoTalk, Papago translation, and some social media — 3 GB covers many travelers, and the cheapest 3 GB option with at least 7 days validity is Travelsim Asia at $6.99 for 15 days. If you lean heavily on maps and translation all day, the 5 GB tier is the safer pick — see the 2-week section below for that comparison.
| Provider | 3 GB price | Validity | Networks |
|---|---|---|---|
| Travelsim Asia | $6.99 | 15 days | SK Telecom + LG U+ |
| Ubigi | $7.00 | 7 days | Not published |
| Nomad | $8.00 | 30 days | SK Telecom + LG U+ + KT |
| Airalo | $8.00 | 3 days | SK Telecom + LG U+ |
| Saily | $8.99 | 30 days | Not published |
1-week verdict: Travelsim Asia's 3 GB plan at $6.99 is the cheapest option that comfortably covers a 7-day trip, with 15 days of validity headroom. Ubigi is a cent behind at $7.00, but only 7 days — fine if your trip is exactly a week, tight if it slips. Nomad's $8.00 / 30-day plan adds the broadest carrier set (all three Korean networks, including KT) and the longest window, so it's the pick if your dates are uncertain. Airalo's $8.00 is 3-day only — avoid it for a week-long trip.
Cheapest South Korea eSIM for a 2-week trip
Two weeks in South Korea with typical tourist usage — heavy Naver Map and Papago, daily KakaoTalk and social media — lands most travelers in the 5–10 GB range. The cheapest options:
| Provider | Plan | Price | Validity | Networks |
|---|---|---|---|---|
| Nomad | 5 GB | $10.00 | 30 days | 3 |
| Saily | 5 GB | $10.99 | 30 days | Not published |
| Travelsim Asia | 5 GB | $11.99 | 30 days | 2 |
| Ubigi | 10 GB | $14.00 | 30 days | Not published |
| Travelsim Asia | 10 GB | $16.99 | 30 days | 2 |
The honest answer on 5 GB and 10 GB: Nomad is the cheapest 5 GB plan at $10.00 / 30 days — Travelsim Asia is $11.99 here, so if 5 GB is exactly what you need, Nomad wins on price (and runs all three Korean carriers). At 10 GB, Ubigi is cheapest at $14.00 / 30 days, with Travelsim Asia next at $16.99. One validity trap to watch: Ubigi also sells a 10 GB plan for just $12.00, but that one is only 7 days — not enough for a two-week trip. The $14.00 version is the 30-day plan you actually want.
Cheapest South Korea eSIM per GB
If you want to find the absolute best value per gigabyte — regardless of trip length — here's how every major provider compares:
| Plan | Provider | Price | Price per GB | Validity |
|---|---|---|---|---|
| 50 GB | Nomad | $39.00 | $0.78/GB | 30 days |
| 25 GB | Ubigi | $25.00 | $1.00/GB | 30 days |
| 20 GB | Travelsim Asia | $19.99 | $1.00/GB | 30 days |
| 10 GB | Ubigi | $14.00 | $1.40/GB | 30 days |
| 20 GB | Nomad | $28.00 | $1.40/GB | 30 days |
| 10 GB | Travelsim Asia | $16.99 | $1.70/GB | 30 days |
| 5 GB | Nomad | $10.00 | $2.00/GB | 30 days |
| 3 GB | Travelsim Asia | $6.99 | $2.33/GB | 15 days |
| 5 GB | Travelsim Asia | $11.99 | $2.40/GB | 30 days |
| 1 GB | Travelsim Asia | $2.99 | $2.99/GB | 7 days |
Larger plans always cost less per GB. The jump from 5 GB to 20 GB roughly halves the per-GB rate.
Per-GB verdict: The lowest absolute per-GB rate in the Korea market is Nomad's 50 GB / 30-day plan at $0.78/GB ($39.00) — but that's only worth it if you genuinely need 50 GB. For the data sizes most travelers actually buy, the best value is Travelsim Asia's 20 GB at $1.00/GB ($19.99) — it matches Ubigi's 25 GB rate to the cent while costing $5 less in total, and on a per-GB basis it undercuts most providers' 10 GB plans. If you're buying mid-size data, the 20 GB plan is the smart move.
Why South Korea eSIM prices vary so much
The same 5 GB of data can cost anywhere from $10 to $12 in Korea, and a 20 GB plan ranges from $19.99 to $30.00. That spread comes down to a few market factors — not random pricing:
- Wholesale carrier access differs by provider. South Korea has three major networks — SK Telecom, LG U+, and KT. Some providers negotiate access to one or two of them; others (like Nomad) carry all three. Broader carrier access usually means a higher wholesale cost, which shows up in the retail price.
- Competition is concentrated at the popular sizes. The 5 GB and 10 GB tiers are where most travelers buy, so providers price aggressively there — that's why Nomad and Ubigi can undercut on the middle of the range. The very small (1 GB) and very large (20 GB) tiers see less competition, which is exactly where a focused operator can lead on price.
- Business model. Marketplaces and app-first brands carry app, account, and marketing overhead. A lean operator delivering by email with no app and no account has less cost to pass on — which is part of how Travelsim Asia keeps the 1 GB, 3 GB, and 20 GB plans the cheapest in the market.
Does cheapest mean worse network coverage?
Not in South Korea — and that's an important point. Unlike some markets, the cheap Korea options still run on major national networks. Here's who runs what:
| Provider | Korean network(s) | Rural / Jeju coverage | 5G |
|---|---|---|---|
| Travelsim Asia | SK Telecom + LG U+ | Excellent | Yes |
| Nomad | SK Telecom + LG U+ + KT | Excellent (broadest) | Yes |
| Airalo | SK Telecom + LG U+ | Excellent | Yes |
| Holafly | SK Telecom + LG U+ | Excellent | Yes |
| Ubigi | Not published | Unknown | Yes |
| Saily | Not published | Unknown | Yes |
The honest read on Korea coverage: The cheap options here aren't running second-rate networks. Nomad — which wins the 5 GB tier on price — actually has the broadest carrier set in this comparison, connecting to all three Korean networks (SK Telecom, LG U+, and KT). Travelsim Asia, Airalo, and Holafly all run the same two: SK Telecom (Korea's largest network) and LG U+. Ubigi and Saily don't publish which Korean carrier they use — usually fine in Seoul and Busan, but worth knowing if you're heading to Jeju Island, the mountains (Seoraksan, Jirisan), or rural Gangwon, where SK Telecom's reach matters most. Coverage is a co-equal quality signal in Korea, not a price differentiator: the cheaper plans are not the weaker ones.
Validity traps: when "cheap" isn't actually cheap
The most common mistakes when picking a South Korea eSIM on price alone:
- Airalo's 1 GB / 3-day plan. At $4.00 it already loses to Travelsim Asia's $2.99 — but the bigger catch is the 3-day window. If your trip is longer than 3 days, this plan expires before you head home. Travelsim Asia is $2.99 with 7-day validity, and Saily is $3.99 on 7 days.
- Ubigi's headline-cheap 10 GB. Ubigi advertises a 10 GB plan at $12.00 — but that's a 7-day window. For a two-week trip you'd need two of them, bringing the total to $24.00. The 30-day version is $14.00, which is the one that actually wins the 10 GB tier. Always check which Ubigi 10 GB you're buying.
- Airalo's short-validity small plans. Airalo's 3 GB / 3-day at $8.00 and 5 GB / 7-day at $10.00 look fine on the price tag, but the tight windows make them poor value for typical trip lengths. Compare the 30-day equivalents before buying — the cheap headline often comes with the shortest clock.
- Holafly — expensive for short trips. Holafly only sells unlimited, priced by duration. On short stays it works out to about $4/day (a 7-day plan is $27.50) — nearly three times what Travelsim Asia's 3 GB plan costs at $6.99 for the same week, with a FUP threshold Holafly doesn't disclose. The per-day rate drops on a 30-day plan (~$2.46/day, total $73.90), making it more competitive only at that length.
Cheapest South Korea eSIM with no app required
Most South Korea eSIM providers require an app and account. If you're buying at the airport — Incheon (ICN), Busan (PUS), or Jeju (CJU) — or on the go with no data connection yet, that creates a practical problem. Travelsim Asia is the only provider in this comparison that requires no app and no account — the eSIM is delivered by email and installs in any browser. And because Korea has no IMEI registration trap (unlike some neighbours), there's no extra paperwork between buying and getting online.
For travelers who want the cheapest option that's also app-free: Travelsim Asia runs on SK Telecom and LG U+ — including SK Telecom, Korea's largest network — and has the lowest-priced 1 GB, 3 GB, and 20 GB South Korea eSIM plans, with no app and no account required. The 1 GB / $2.99 plan is the lowest 1 GB price in the Korea market and the only one requiring nothing more than your email to install.
Full price comparison: all providers, all plans
All prices in USD. Fixed data plans only — unlimited plans are excluded here because throttling makes a direct price comparison misleading.
| Data | Travelsim Asia | Airalo | Nomad | Saily | Ubigi |
|---|---|---|---|---|---|
| 1 GB | $2.99 / 7d | $4.00 / 3d | $4.00 / 7d | $3.99 / 7d | $4.00 / 7d |
| 3 GB | $6.99 / 15d | $9.00 / 7d | $8.00 / 30d | $8.99 / 30d | $7.00 / 7d |
| 5 GB | $11.99 / 30d | $11.00 / 30d | $10.00 / 30d | $10.99 / 30d | — |
| 10 GB | $16.99 / 30d | $19.00 / 30d | $18.00 / 30d | $18.99 / 30d | $14.00 / 30d |
| 20 GB | $19.99 / 30d | $30.00 / 30d | $28.00 / 30d | $29.99 / 30d | $25.00 / 30d (25 GB) |
| 50 GB | — | $49.00 / 30d | $39.00 / 30d | — | — |
Prices as of June 17th, 2026. Bold = cheapest in row. "d" = days validity. Ubigi's largest standard plan is 25 GB (shown in the 20 GB row). Always confirm on provider websites before purchasing — plans change.
Final verdict: which is the cheapest South Korea eSIM?
- Cheapest for short trips (1–3 GB): Travelsim Asia — $2.99 for 1 GB / 7 days and $6.99 for 3 GB / 15 days. Lowest prices at this tier with the best validity. Saily's 1 GB is next at $3.99; Ubigi's 3 GB is a cent behind at $7.00 but only 7 days.
- Cheapest 5 GB: Nomad — $10.00 / 30 days, the cheapest 5 GB in the market. Travelsim Asia is $11.99 here, so if 5 GB is exactly what you need, Nomad is the value pick — and it runs all three Korean carriers.
- Cheapest 10 GB: Ubigi — $14.00 / 30 days, clearly the cheapest 10 GB. Travelsim Asia is next at $16.99 (beating Nomad's $18.00, Saily's $18.99, and Airalo's $19.00), but Ubigi wins this tier outright. Watch the validity — Ubigi's $12.00 version is only 7 days.
- Cheapest 20 GB (and best mid-size value): Travelsim Asia — $19.99 / 30 days, and it's not close. The next cheapest 20 GB is Nomad at $28.00, then Saily at $29.99 and Airalo at $30.00 — Travelsim Asia is more than 25% below the next option. At $1.00/GB it even undercuts most providers' 10 GB plans on a per-GB basis. For a longer trip or a heavier user, this is the strongest deal in the market.
- Watch out for: Holafly on short trips (unlimited only, about $4/day on short stays, undisclosed FUP). Airalo's 1 GB and 3 GB plans for trips longer than 3 days. Ubigi's $12.00 / 7-day 10 GB if your trip runs past a week. And remember the coverage point — the cheaper options here still run major Korean networks, so price and coverage don't trade off the way they do in some markets.
Dig deeper
More detail on the South Korea eSIM decision:
- South Korea eSIM Prices 2026 — full provider-by-provider price breakdown, including unlimited plans from Holafly, Nomad, Saily, and Ubigi.
- Best eSIM for South Korea (2026) — full comparison on coverage, throttling, setup, and value — not just price.
- Travelsim Asia vs Airalo South Korea eSIM — head-to-head on the two most popular options.
- How Much Data Do You Need for South Korea? — full breakdown by trip type, usage habits, and destination.
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